I have a Tekin in my 1/12 scale and the KO in my TC. Both are very good and fast. The biggest difference I see is that the Tekin can be updated with software that is downloaded and the KO has to be sent back in. Both are very programable with the KO being the easiest. You get to set timing advance all the way accross the full range while the Tekin gives the timing to you in increments based on the start & end rpm range you enter. Both accomplish the same thing, just in a different way.
The one thing that Tekin has that the KO does not is the turbo boost, which is nice if you run on a big track and can use it on the straight away. I do know that KO is working on an upgrade but not sure what will be changed. I run with a KO factory team member and he has had a couple of new ones lately to test. Hard to tell if the new one is faster as he is fast with anything.
I can say that the Tekin with the new software is faster in my 1/12 scale car by about .3-.4 a lap over the current KO. I have been able to match the fast lap on our track and I can bet it's not because of my driving skill.
Is that non comittal enough for you?